Production of supply spools of strip material



May 3, 1932. BI. AIVAZ 1,856,823

PRODUCTION OF SUPPLY SPOOLS OF STRIP MATERIAL Filed Dec. 6, 1928 2Sheets-Sheet l i nn N [I 1 May 3, 1932. B. AIVAZ PRODUCTION OF SUPPLYSPOOLS OF STR IP MATERIAL Filed Dec. 6, 1928 2 Sheets-Sheet 2 Patentedmy 3, 1932 OFFICE roars maz, or sunarrs'r; HUNGARY PRODUCTION or sUrr YsrooLs or STRIP MATERIAL Application filed December 6, 1928, Serial No.324,165, and in Great Britain December 8, 192?.

This invention relates to the production of supply spools of materialcomprising crepe or corrugated paper, and especially of an extensiblematerial comprising alternating layers of crepe or corrugated paperandan absorbent substance such as loose or unwoven or matted cellulosefibres, paper wadding or the like, such asis described in my co-pendingapplication No. 33276/27.

For the economical production of effective filter wads it is necessaryto use supply spools of such material in which the creping, stiffnessand other characteristics of the composite strip are substantiallyconstant throughout the spool. It is furthermore essential that theintervening layer or layers of absorbent material should not besubjected to any substant'al degree of stretching while they are beingapplied'between the layers of crepe or corrugated paper in the formationof the supply spools, or subsequently in the production of the wads,otherwise the layer of absorbent substance will become torn orotherwiseunevenly distributed with the result that the filtering properties ofthe wads will be impaired. It is also important that the crepe orcorrugated paper should not be subjected, during the formation of thesupply 'spools, to any substantial degree of stretching that wouldsubstantially reduce that creping or corrugations and that, the .crepingshould be substantially uniform throughout.

The present invention has among its objects to provide efiective meansby which the layer or layers of absorbent substance. such as loose,unwoven or matted cellulose fibres,

paper wadding or the equivalent, may be applied upon or between thelayers of crepe or corrugated paper so as to form the compositematerial, and to provide simple and effective means whereby a coating ofadhesive, preferably comprising a fire-proofing or impreg- 45 natingsubstance, may be applied upon one side of the supply spool for thepurpose of preventing unwinding, deformation or displacement thereofduring transport and of impregnating with fire-proofing substance f theedge of the strip, which when formed into spools.

. ing mechanism.

a wad is disposed adjacent the filling of toacco.

According to the present invention the layers of crepe or corrugatedpaper and of absorbent substance are withdrawn from supply rolls whichmay be rotated in unison at a suit able speed and are associatedtogether in such manner that the layer or layers of absorbent substance.is or are applied upon or between the layers of crepe or corrugatedpaper without any tendency of the layer or layers of absorbent substanceto tear or become stretched. 1 For this purpose the layers of crepe orcorrugated paper upon which the absorbent substance is applied may becaused to" pass around the respective supply rolls of the absorbentsubstance so that the layers of the latter become applied upon, andadhere to, the respective layers of crepe qr corrugated paper beforeleaving their respective supply rolls. The layers of crepe on corrugatedpaper with the absorbent material applied thereon are combined togetherinto a composite strip or band and a further layer of crepe orcorrugated paper is applied upon the 7 exposed layer of absorbentsubstance so as to complete the composite strip or band of material,which is subsequently, by known means, 4

.cut into parallel strips or ribbons of suitable width and rolled orwound to form supply For the purpose of facilitating the application ofthe coating of adhesive to one side of the supply spool, a spring clipor the equivalent is applied upon each spool, on its withdrawal from thecutting and rolling or wind- The spool is introduced edgewise between apair of co-operatin rollers, one of which dipsinto a suitable ad esivesolution such as hereinafter described, the spring clip or theequivalent being withdrawn as the spool passes between the rollers.After the spool has received thecoating of adhesive, it is removed,preferably on a flat plate or tray, and allowed to dr whereupon it ma beandled and transported without unwin ing or deformation.

The invention is hereinafter described by way of example with referenceto the accompanying diagrammatic drawings, in which Figure 1 is a sideelevation illustrating a machine according to the invention forproducing supply spools of composite material, such as before referredto, comprising three layers'of creped or corrugated paper with twointervening layers of absorbent substance.

Figure 2 is a detail view in end elevationillustrating the cuttingdevice.

Figure 3 is a detail view in longitudinal section illustrating theconstruction of the windin% roll.

igures 4 and 5 are views, 111 cross section and side elevationrespectively, of a supply spool provided with a retaining clip, and

Figures G and 7 are views, in part sectional side elevation and in endelevation respectively, showing a suitable form of machine for use incoating one side of the supply spools with an adhesive.

In carrying the invention into effect according to one preferredembodiment adapted for the production of supply spools of compositematerial comprising, for example, five alternating layers of crepe orcorrugated paper and an absorbent substance such as loose, unwoven ormatted cellulose fibres or the equivalent, i. e. three layers of crepeor corrugated paper with two intervening layers of the absorbentsubstance, and with reference to Figures 1, 2 and 3 of the accompanyingdiagrammatic drawings, the supply rolls a, a of the absorbent substancemay be supported on parallel spindles a a disposed substantially in thesame horizontal plane, while the supply rolls 6, b for the two lowerlayers of the crepe or corrugated paper may be supported upon spindles,b 6 disposed somewhat above and at the rear, or at the front of thespindles a a carrying the rolls a, a of absorbent material. Therespective layers b, b of crepe or corrugated paper are led from theunder side of the two supply rolls 6, b referred to and are passed overand round the respective supply rolls a, a of absorbent substance, andthence led in a direction for example opposite to the direction of theirwithdrawal from the respective supply rolls 6, b. By such me ans thelayers 6*, b of crepe or corrugated paper are pressed lightly upon therespective layers a, a of the absorbent substance before the latter arewithdrawn from their respective supply rolls a, a so that thus, thelayers b, b of crepe or corrugated paper serve as carriers or backingsto which the respective layers a, a of the absorbent substance adhereand by which they are drawn off from their supply rolls a, a It isimportant that no substantial tension should be exerted upon the layers1), b of crepe or corrugated paper during or after the application ofthe absorbent substance thereon, otherwisethe layers a, a of theabsorbent substance will become torn or will be irregularly appliedwhereby the supply spools produced, and consequently the wads, will notbe constant as regards their absorbent properties.

The supply rolls are so arranged that the two layers b', b of crepe orcorrugated paper having the layers a, a of absorbent substance appliedthereon in the manner described may be led together or combined to forma composite material, and in order to complete the composite material anadditional layer 1; of crepe or corrugated paper is withdrawn from asupply roll b and laid or applied upon the upper exposed layer a ofabsorbent substance. The machine may be modified to produce a compositematerial comprising more or less than five layers, for example three orseven.

The composite material comprising the three layers 1), b", b of crepe orcorrugated I paper and the two intervening layers a, a of absorbentsubstance is conducted to cutting and winding mechanism of any suitableform. According to one construction the composite material may be ledover a roller 0 to a cutting device by which the length of materialiscut into parallel strips or ribbons of suit able width. The cuttingdevice may consist, as shown in Figures 2 and 3, of a plurality of disccutters d mounted upon a rotatable shaft d and co-operating withcircumferential grooves e or recesses in a cylindrical matrix 0 disposedbeneath, means being preferably provided whereby the cutters d may beraised out of action as by mounting the supporting shaft d in eccentricsd as to permit the introduction of a fresh length of composite materialthrough the cutting device for attachment to the winding roll 7 or theequivalent. The latter may comprise .a spindle mounted in suitablebearings g and disposed parallel with the shaft (1 upon which thecutters d are mounted, the spindle 9 being adapted to receive aplurality of ring-like formers f of cardboard or the like, of a widthcorresponding to the width of the ribbons or strips aforesaid, theformers f being'clamped upon the spindle g for example by means of ascrew threaded collar f or the equivalent. Mechanism may be providedwhereby the distance I 1 diameter of the material upon the winding -rollf increases and preferably so that the parallel ribbons or strips ofmaterial are withdrawn from the cutting devices substantiallyhorizontally. Thus, the bearings g carrying the winding roll 7 may bemounted at the ends of a pair of arms fixed at their lower ends upon arotatable shaft 9 and the arms 9 may be supported, in such position thatthe top of the roll f is substantially on a level with the top of thematrix e of the cutting device, by means of tension rods 9 pivoted tothe arms '9 and to blocks 9* or the like mounted upon a screw threadedshaft g carried in suitable thrust bearings and rotated, in accordancewith the rate of feed of the material through the cutting device, as bymeans or worm and worm wheel gearing g from the shaft a carrying theroller 0. .By such means the winding roller f may be permitted to movegradually away from the cutting device and downwardly, as indicated indotted lines, so that the material is withdrawn from the cutting deviceatvall times substantially horizontally. The winding roller 7 may bedriven from a main driving shaft 12 by means of belt and spur gearing p19 operating through a very lightly loaded clutch, or other means 1 maybe provided so that the material is withdrawn from the cutting deviceunder very light tension. The cutters 03 may be similarly driven by abelt or chain drive 17 p from the driving shaft p. The supply rolls a, a6, b 6 may be positively rotated in unison. For example, alongitudinally extending shaft 32 may be driven from the driving shaft pby means such as worm and worm wheel gearing and may drive a secondlongitudinally extending shaft p through variable gearing such as a pairof coned pulleys 12 This second shaft 2 may be directly geared to theshafts 6 a a carrying the rolls 6, a and a respectively, as by means ofbevel gearing, and may also drive the shafts 6 b carrying the rolls 1),b as by means of bevel gearing and intermediate vertical shafts.Alternatively only the supply rolls 6, 71 b of crepe or corrugated papermay be so driven, the necessary rotation of the supply rolls a, a ofabsorbent substance being effected by the engagement of the layers a", aof crepe or corrugated paper around them. If desired the drive to therolls a, a or to any or all of the supply rolls may be transmittedthrough very lightly loaded clutches to allow for the difference inthick ness of the respective materials. The roller 0 may be driven fromthe shaft 10 as by means of bevel gearing and an intermediate verticalshaft, and the whole mechanism is so arranged and operated that nosubstantial tension is imposed upon the separate layers of material orupon the composite material at any position in the machine. The variablegear connecting the two shafts 0 1) may be automatically controlled byany suitable means to compensate for the gradually decreasing diameterof the supply rolls of material, or the necessary adjustment may be madeby hand.

In the operation of the machine the composite material is conductedthrough the cutting device, the cutters d of which have been raised outof action, and is secured, for example'by means of adhesive or pins, tothe series of formers f clamped upon the winding spindle f,-it beingunderstood that the formers f are disposed in accurate lateral registerwith the cutters d. The machine is .set in operation and the cutters dare immediately lowered into the working position. Thus it will beunderstood that the leading part of the length of composite materialthat is wound upon the formers f is not cut longitudin ally into ribbonsor strips, but may be readily broken away or separated'when the spoolscarried by the formers f are removed from the winding spindle f.

On the completion of the winding operation the machine is stopped andthe supply spools it carried by the ring-like formers f v are removedfrom the windlng spindle f one by one, a spring clip i (such as shown inFigures 4 and 5) being applied to each spool h to retain its form whilea coating of adhesive is applied to one side thereof as hereinafterdescribed. The springclip 2' according to one simple form may consist ofa strip of spring sheet metal bent to a- U form correspondingsubstantially to the cross-section of the spool k. The parallel disposedparts i of the spring clip are preferably diverted slightly inwardlytowards one another so as to engage the opposite sides of the spool 71.with sufficient pressure to prevent the latter from unrolling orbecoming displaced or deformed,

it being understood that t-he spools h are only lightly wound and thatif removed without the use of some retaining means such as describedthey would immediately spring open or become displaced or deformed tosuch an extent as to render them unsuitable for use in co-pendingapplications before referred to.

In order to preserve the shape of the supply spool 71., as, for example,during transport and when in position on the wad-forming machine, it ispreferred to apply a coating of an adhesive to one face of the spool.The coatmg 1s pregnation or absorption of the solution into theabsorbent layers of the material extends for about 2 mms. from the edgeinwardly. It has been found that if the absorption of the adhesiveextends too far from the edge of the material, tearing of the layers ofmaterlal may result during the wad forming operations. In order tosecure an even coating of the adhesive, in which the impregnationextends to the desired depth, it is advantageous to use the apparatushereinafter described with referenceto Figures 6 and 7.

A tank or vat j, preferably rectangular, is provided with a heatingjacket j containing water which is maintained for example at boilingpoint by means such as gas burner k disposed beneath. The tank or vatmay be supported upon suitable feet 1' for example to the wad formingmachines described in my preferably regulated so that theimits peripherymay dip into an adhesive solution, such as hereinafter descrlbed,contained within the tank or Vat j. The roller Z is preferablyconstructed of hard wood, or may be covered with hard rubber or withfelt and is preferably driven at a constant slow or mod. erate speed bya suitable motor n. A freely rotatable roller 0 is mounted in bearings0, slidable Vertically in guides 0 in the standards m, to extendvertically above and parallel with the driven roller 1 and means such asturn screws 1", 0 are provided whereby the rollers Z, 0, may be adjustedvertically to vary the extent to which the driven roller Z dips into theadhesive and to vary the clearance between the rollers Z, 0, whichclearance preferably corresponds exactly to, or is slightly less thanthe thickness of the spool h. The spool h to be coated is fed betweenthe rollers Z, 0 by hand at such rate that the desaid degree of coatingor impregnation is secured, the spring clip 2' hereinbefore referred tobeing simultaneously withdrawn. The thickness of the coating or thedegree of impregnation may be regulated to some extent by varying theclearance between the rollers l, 0, so that more or less pressure may beapplied upon the spool h, in its passage between the rollers, thethickness of coating or the degree of impregnation increasing with thepressure applied. It is preferable to feed the spool h, between therollers l, 0 so that it is retarded with respect thereto, so that africtioning effect is secured.

The tank or vat j is preferably provided with a transverse partition orpartitions j by which it is divided into compartments, to one i of whichthe driven roller Z has access, while the remaining compartment orcompartments serve as reserve tanks containing a fresh supply of heatedadhesive which may pass, or be introduced, into the working compartmentj when required, as for example when the level of the adhesive thereinfalls orwhen the adhesive becomes too dirty for further use and has tobe removed. Valvedopenings may be provided in the partition orpartitions 9' so that the reserve supply of heated adhesive may be cutoil while the working compartment 7" is being cleaned out, and toprevent admixture of the dirty adhesive with the fresh clean supply.Thereserve compartment or compartments j may communicate with theworking compartment 9" through non-return valves 9' or strainers so thatwhile fresh adhesive mayfiow into the working chamber 1" as the levelfalls therein, backfiow of foreign. matter or of dirty adhesive into thefresh supply may be obviated. Fresh adhesive solution may be supplied tothe reserve compartment or compartments j by ball float valve mechanismor other means whereby the level of the adhesivein the tank or vat j maybe automatically maintained sub-' stantially constant. The tank or wit3' is pref- 'erably covered in at the top as by means of a lid 1- exceptfor an aperture through which the driven roller dips into the adhesive.

It will be understood that the invention is not limited to theconstruction of apparatus described for the coating of the'spools. Thusan endless'band dipping'into the adhesive could be used in conjunctionwith the driven roller. Furthermore the apparatus may be modified insuch manner that a waterproofing solution may be applied to the otherface of the spool, but this is in general not desired.

A suitable adhesive solution for coating the supply spools may consistof: 200 g. aluminum sulphate, 500g. water, 200 g. yellow dextrin, 500 g.water. Such an adhesive composition dries into a crystalline form whichis adapted to crumble and fall away during the operations of forming thewad so that the longitudinal passages through the wad are not obstructedand there is no liability of the adhesive imparting disagreeable tasteto the cigarette. Furthermore the aluminium sulphate or the equivalentwhich is absorbed into the edge of the absorbent material serves tofire-proof the end of the wad which becomes disposed adjacent thefilling of tobacco, so that cigarette ends may be prevented fromsmouldering for any substantial time and any possibility of burning orsmoking the paper after the tobacco is consumed may be obviated.

It is desirable to avoid the use of fireproofing chemicals which areliable to dissociate under the action of heat to produce noxious ordeleterious fumes or a disagreeable taste at the conclusion of thesmoke. For use in cigarette holders and the like the fireproofingchemicals may be dispensed with.

By the use of supply spools according to the invention, efiective'filter wads may be econom cally produced in large quantities in whichthe creping or corrugating ofthe unabsorbent paper and the evendistribution of the absorbent substance, and consequently the quality ofthe filter wads produced, remain substantially constant. I

What I claim is:

1. Apparatus for producing composite ma terial of paper and anadsorbent, comprising a supply roll for the absorbent substance, asupply roll for the paper, arranged in such manner that the layer ofpaper may be led around the supply roll of the absorbent substance toreceive the layer of the latter without tearing or stretching thereof,an additional supply roll for paper arranged for the application of afurther layer of paper upon the exposed layer of the absorbentsubstance, cutting mechanism for cutting the composite material intoparallel strips, and means comprising a winding spindle carrying aplurality of cylindrical formers for winding the resulting strips ofcomposite material into supply s ools.

2. An apparatus or producing composite material of paper and anabsorbent compris-. ing a supply rollfor the absorbent substance, asupply roll for the paper arranged in such manner that the layer of apermay be led around the supply roll of t e absorbent substance to receivethe la er of the latter with- 1 out tearing or stripping thereof, anadditional supply roll for paper arran ed for the application of afurther layer 0 paper upon the exposed layer of the absorbent substance,cutting mechanism for cutting the composite material into parallelstrips, means comprising a winding spindle carrying a plurality ofcylindrical forms for winding the resulting strips of com osite materialinto supply spools, means or driving the 2 supply rolls, means forfeeding or conveying the material, means for winding the material andsaid driving, feeding and winding means being driven in such manner thatany substantial tension upon the material is avoided.

In testimony whereof I aflix my signature.

BORIS AIVAZ.

